package cn.itcast.service;

import cn.hutool.core.util.ObjectUtil;
import cn.itcast.pojo.Permission;
import cn.itcast.pojo.Role;
import cn.itcast.pojo.User;
import com.alibaba.dubbo.config.annotation.Reference;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
@Slf4j
public class SpringSecurityUserService implements UserDetailsService {



    @Reference
    private UserService userService;
     //根据用户名查询数据库，获取用户信息

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
  //使用dubbo提供方查询数据库用户信息
        log.info("用户名：{}",username);

        User user = userService.findByUsername(username);

        System.out.println(user);

        if (ObjectUtil.isEmpty(user)){
            //用户名不存在
            return null;
        }

        //动态为当前用户授权
        //将用户信息返回给框架
        //框架会进行密码比对(页面提交的密码和数据库中查询的密码进行比对)
        List<GrantedAuthority> list = new ArrayList<>();
        Set<Role> roles = user.getRoles();
        for (Role role : roles) {
            //遍历角色集合，给用户授予角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));//授权
            Set<Permission> permissions = role.getPermissions();

            for (Permission permission : permissions) {
                //便利权限集合，为用户授权
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));//授权
            }

        }




        org.springframework.security.core.userdetails.User securityUser = new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
            return securityUser;



    }
}
